list next version when preparing fixtures

Author: pieh

tests/prepare.mjs

@@ -106,6 +106,11 @@ const promises = fixtures.map((fixture) =>
     }
     output.stderr?.pipe(addPrefix).pipe(process.stderr)
     return output.finally(async () => {
+      const npmListPromise = execaCommand(`npm list next`, { cwd, stdio: 'pipe' })
+      npmListPromise.stdout?.pipe(addPrefix).pipe(process.stdout)
+      npmListPromise.stderr?.pipe(addPrefix).pipe(process.stderr)
+      await npmListPromise
+
       await setNextVersionInFixture(cwd, 'latest', {
         logPrefix: `[${fixture}] `,
         operation: 'revert',